Deposition mask and method for manufacturing organic light emitting display using the same

• US 20060012280A1
• Filed: 07/14/2005
• Published: 01/19/2006
• Est. Priority Date: 07/15/2004
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Tae-Seung, Hong, Jae-Min, Kang, Chang-Ho
• Granted Patent: US 7,618,674 B2
• Time in Patent Office: Days
• US Class Current: 313/310
• CPC Class Codes: C23C 14/042 using masks
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/166 using selective deposition, e.g. using a mask

Abstract

A deposition mask and a method for manufacturing an organic light emitting display (OLED) using the same are provided. The deposition mask is intended for preventing an organic film from being damaged due to touching of a blocked-off portion of the mask to an emission layer (EML), or chemical transition from being generated at the organic film. For that purpose, the deposition mask stuck to a substrate of the OLED to deposit an organic EML includes an opening and an indentation. The opening is opened so as to deposit the organic EML. The indentation is indented a predetermined depth from a plane facing the substrate.

Claims

1. A deposition mask, comprising:

a generally planar portion;

an opening in the planar portion, that permits deposition of an organic emission layer on a substrate of an organic light emitting display; and

an indentation in the planar portion indented, having a predetermined depth on a side of the planar portion facing the substrate,

wherein only a portion of the mask contacts the substrate, and the portion firmly contacts the substrate.

2. The mask of claim 1, wherein the indentation corresponds to a display portion of the organic light emitting display.

3. The mask of claim 1, wherein the opening corresponds to an organic emission layer of a first color and the indentation corresponds to an organic emission layer of a second, different color.

4. The mask of claim 1, wherein the organic light emitting display has a red emission region with a red organic emission layer, a green emission region with a green organic emission layer, and a blue emission region with a blue organic emission layer,

wherein the opening permits deposition of an organic emission layer of a first color and the indentation corresponds to organic emission layers of a plurality of other colors.

5. The mask of claim 1, wherein the organic light emitting display comprises a red sub-pixel with a red organic emission layer, a green sub-pixel with a green organic emission layer, and a blue sub-pixel with a blue organic emission layer,

wherein the opening permits deposition of an organic emission layer of a sub-pixel of a first color, and the indentation corresponds to regions ranging from sub-pixels of the first color deposited to sub-pixels of other colors.

6. The mask of claim 1, wherein the indentation is indented from the surface facing the substrate to a depth greater than a thickness of the organic emission layer and less than half of a thickness of the mask.

7. A method for manufacturing an organic light emitting display, comprising:

forming a first electrode on a substrate;

forming an organic emission layer on an upper portion the first electrode;

forming an organic emission layer on the first electrode by firmly contacting a mask to the substrate and depositing emission layer material through the mask, wherein the mask has an opening and an indentation that does not contact the substrate, and the emission layer material is deposited through the opening;

forming a second electrode on an upper portion of the organic emission layer; and

sealing the substrate.

8. The method of claim 7, wherein the indentation corresponds to a region where the organic emission layer is formed.

9. The method of claim 7, wherein the forming of the organic emission layer is performed by depositing organic emission layers of different colors using different masks, the opening of the mask is provided to a region that corresponds to an organic emission layer of the first color and the indentation is provided to a region that corresponds to an organic emission layer of a second, different color.

12. The mask of claim 7, wherein the indentation is indented from the surface facing the substrate to a depth greater than a thickness of the organic emission layer and less than half of a thickness of the mask.

10. A method for manufacturing an organic light emitting display, comprising:

forming a first electrode on a plurality of panel regions of a substrate;

forming an organic emission layer on the first electrode by firmly contacting a mask to the substrate and depositing emission layer material through the mask, wherein the mask has an opening and an indentation that does not contact the substrate, and the emission layer material is deposited through the opening;

forming a second electrode on an upper portion of the organic emission layer;

sealing the substrate; and

dividing the substrate by panel region unit.

11. The method of claim 10, wherein the forming of the organic emission layer is performed by depositing organic emission layers of various colors using various masks, the opening of the mask corresponds to a region that corresponds to an organic emission layer of a first color and the indentation is provided to a region that corresponds to an organic emission layer of a second, different color.